Genesis 35:21-23

Darby Translation

²¹ And Israel journeyed, and spread his tent on the other side of Migdal-Eder.

²² And it came to pass when Israel dwelt in that land, that Reuben went and lay with Bilhah, his father's concubine; and Israel heard of it. And the sons of Jacob were twelve.

²³ The sons of Leah: Reuben—Jacob's firstborn—and Simeon, and Levi, and Judah, and Issachar, and Zebulun.